Um... well, you might want to flash the firmware as a first step. Go to
S4 Firmware to get it from Bitmain.
Also, make sure you don't have that miner exposed to the outside world (i.e. you don't have port forwarding to it). Change the password for sure.
Wow, where did you get the miner? Maybe seller flashed it with his own info but looking at the address your not the only one this is happening to, this hacker made over 8btc so far with this hack.